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The kidney ultrafiltration barrier is formed of endothelial cells, the glomerular basement membrane and podocytes. Podocytes have a central role in normal physiology and disease pathogenesis of the glomerulus. Signaling through epidermal growth factor receptor (EGFR) in podocytes mediates development of many glomerular disease processes. In this work, we have identified zinc finger FYVE-type containing 28 (ZFYVE28) as a novel highly podocyte-enriched gene. We localize ZFYVE28 in podocyte foot processes in adult kidney. During glomerulogenesis, Zfyve28 is first expressed at the early capillary loop glomerulus. In cultured podocytes, we show that overexpression of ZFYVE28 promotes EGF-signaling, possibly by up-regulating EGFR expression and by modulating its localization. To study the role of ZFYVE28 in vivo, we generated both conventional and podocyte-specific knockout mouse lines. Kidneys developed normally in ZFYVE28-deficient mice. In adult mice, the absence of ZFYVE28 did not affect the maintenance of the filtration barrier. Moreover, ZFYVE28-deficiency did not affect the outcome of glomerular damage induced by injection of nephrotoxic serum. Taken together, we have identified Zfyve28 as a new molecular component of podocyte foot processes and show that it mediates EGF-signaling in podocytes. However, ZFYVE28 is not essential for the development or maintenance of the glomerulus filtration barrier.
Pubmed ID: 29549365
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Generate, archive, and distribute world-wide up to 12.000 conditional mutations across the mouse genome in mouse embryonic stem (ES) cells and Establish a limited number of mouse mutants from this resource. EUCOMM contributes the largest fraction of conditionally trapped and targeted genes in mouse C57BL/6N embryonic stem (ES) cells to the IKMC. EUCOMM vectors, mutant ES cells and mutant mice are distributed worldwide, enabling functional genomics research in a standardized and cost-effective manner by a much wider biomedical research community than has been possible previously. EUCOMM mutant ES cells and vectors can be obtained from the European Mouse Mutant Cell Repository (EuMMCR). EUCOMM mutant mice are archived and distributed by the European Mouse Mutant Archive (EMMA). Mutagenesis Strategies * Conditional gene trapping - random approach for expressed genes * Conditional targeted trapping - directed approach, used for expressed genes * Conditional gene targeting - directed approach, used for non-expressed genes
View all literature mentionsCenter that produces knockout mice and carries out high-throughput phenotyping of each line in order to determine function of every gene in mouse genome. These mice will be preserved in repositories and made available to scientific community representing valuable resource for basic scientific research as well as generating new models for human diseases.
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